Dr. Ruth Williamson, MD
625 S Fair Oaks Ave Ste 100, Pasadena, CA 91105 • +1-239-555-4679
Medical Education: Accredited U.S. Medical School (Class of 1992)
What This Doctor Actually Performs: CMS Medicare Utilization & Pasadena Percentiles
NPI #1952486912 • CBSA Regional • Radiation Oncology
Dr. Ruth Williamson, MD (NPI #1952486912) practices Radiation Oncology in Pasadena, CA (91105) with sub-specialty concentration in 24 Active CMS HCPCS Codes, recording 1,550 annual CMS services across 146 distinct beneficiaries—placing this practice as a mid-cohort balanced caseload (50th Pasadena percentile) (-0.46σ vs CA state mean, 30.61th statewide percentile).
Fee-schedule auditing of NPI 1952486912 highlights 698 annual claims for 99214 (50th Pasadena percentile; $171–$234 self-pay corridor) plus 403 encounters under 99213 and 202 under 93000.
Self-pay new patient consultations with Dr. Williamson (CPT 99204 GPCI-adjusted benchmark) estimate around $239.00 (community reported average: $239.00) with in-person clinic visits only, 18-minute average reception wait, and a 4.90/5 modern protocol openness score across 18 patient logs.
Patients evaluating Dr. Ruth Williamson in ZIP 91105 note 34 years of post-doctoral tenure (null, 1992) alongside 10.6 annual CMS procedures per patient.
Compared against Pasadena, CA Radiation Oncology peers
1,550 annual services across 146 beneficiaries
Standard deviations from CA Radiation Oncology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Moderate-to-High Complexity Internal Medicine Follow-Up | 698 | 50th | $171 – $234 |
| 99213 | Established Preventive & Chronic Care Visit | 403 | 46th | $131 – $179 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 202 | 49th | $62 – $85 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 155 | 46th | $200 – $274 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 93 | 53th | $237 – $325 |
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Dr. Ruth Williamson, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Williamson National Provider Identifier | NPI #1952486912 (MD) | CMS NPPES Registry (91105) |
| Dr. Williamson Pasadena CMS Volume Rank | 50.00th Pct (1,550 CMS svcs; Z -0.456σ) | CMS Medicare Part B (CA Radiation Oncology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Pasadena, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 18 min lobby wait | 18 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.92/5 Listening • 4.90/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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